Commissioning
en
Installation and operating instructions Wilo-EMU TR/TRE 212 ... 326-3
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CSA Ex rating
The mixers are suitable for operation in potentially explosive atmospheres:
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Protection class: Explosion-proof
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Category: Class 1Division 1
7.5
Before switching on
Before activating the mixer, check the following points:
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Check whether the device has been installed properly and in accordance with the
locally applicable regulations:
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Has the mixer been earthed?
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Has the connection cable route been checked?
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Has electrical connection been made in accordance with regulations?
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Are mechanical components attached correctly?
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Check the operating conditions:
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Min./max. fluid temperature checked?
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Max. immersion depth checked?
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Intermittent operation: Max. switching frequency complied with?
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Check installation location/operating space:
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Has the minimum water level above the propeller been defined and monitored?
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Min. fluid temperature can drop below 3 °C: Monitoring device with automatic
deactivation installed?
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No installations within the direct rotary range of the propeller?
7.6
Switch on and off
The mixer must switch on and off using a separate operating point (on/off switch,
switchgear) set by the customer.
During the start process, the rated current is exceeded for several seconds. Current
consumption continues to be slightly above the rated current until the operating tem-
perature of the motor is reached and the flow in the basin increases. During regular op-
eration, the rated current should no longer be exceeded.
CAUTION! If the mixer does
not start up, switch off immediately. Remove the fault before reactivating!
7.7
During operation
WARNING
Risk of burns from hot surfaces!
Motor housing can become hot during operation. It may cause burns. Allow the mo-
tor to cool down at ambient temperature after switching it off!
WARNING
The propeller blade has sharp edges!
Sharp edges can form on the propeller blades. There is a risk of limbs being severed.
Wear safety gloves to protect against cuts.
During operation, observe the locally applicable regulations on the following topics:
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Work safety
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Accident prevention
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Handling electrical machines
Personnel responsibilities specified by the operator must be strictly adhered to. All per-
sonnel are responsible for ensuring that responsibilities and regulations are adhered to!
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Operating voltage (+/-10 % of the rated voltage)
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Frequency (+/-2 % of the rated frequency)
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Current consumption between individual phases (max. 5 %)
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Voltage difference between the individual phases (max. 1 %)
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Max. switching frequency
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Minimum immersion of the propeller
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Quiet/low-vibration running
Increased current consumption
Depending on the fluid and the flow, the current consumption may vary slightly. If cur-
rent consumption is elevated for a longer period, this indicates a change in configura-
tion. The cause for a change in conditions could be:
